Finding the Fourth Proportional to 63,956.10, 89,421.90 and 63,956.10

Step by Step Solution

1. Step 1: Write the proportion equation
   63,956.10 : 89,421.90 = 63,956.10 : x
2. Step 2: Convert to fraction form
   63,956.10/89,421.90 = 63,956.10/x
3. Step 3: Cross multiply
   63,956.10x = 89,421.90 × 63,956.10
4. Step 4: Simplify right side
   63,956.10x = 5,719,075,978.59
5. Step 5: Solve for x
   x = 5,719,075,978.59/63,956.10
6. Step 6: Final answer
   x = 89,421.90